99平方+101的平方-2分之100的平方等于
=99^2+101^2-(100^2)/2
=99^2+101^2-(100^2)/2
=(99+101)^2-2*99*101-(100^2)/2
=200^2-2*(100-1)*(100+1)-(100^2)/2
=200^2-2*(100^2-1)-(100^2)/2
=4*100^2-2*100^2-(100^2)/2+2
=(3/2)*100^2+2
=(3/2)*10000+2
=15002